Lieutenant-Colonel Sir Francis Vivian Dunn KCVO OBE FRSA (24 December 1908 – 3 April 1995) was a British conductor who was Director of Music of the Portsmouth Division of the Royal Marines from 1931 to 1953 and Principal Director of Music of the Royal Marines from 1953 to 1968.

Dunn was released from his contract with the BBC and on 3 September 1931 commissioned as a lieutenant in the Royal Marines to be director of music for the Portsmouth Division of the Corps.

Dunn and the Royal Marines Band accompanied Queen Elizabeth II and Prince Philip, Duke of Edinburgh on the SS Gothic for the post-coronation Commonwealth Tour.

In 1955, Dunn was asked by Euan Lloyd of Warwick Films to compose the theme music for The Cockleshell Heroes (which was otherwise scored by John Addison).

[2] Upon retiring from the military in December 1968, Dunn became a guest conductor with the City of Birmingham Symphony Orchestra.

In 1969, he received an EMI Golden Disc for sales of more than one million Royal Marines Band records.

These include The Globe and Laurel (1935, revised 1945), The Captain General (1949), Cockleshell Heroes (1955) and Mountbatten March (1972).